import java.util.Scanner;
public class Eighth {
	public static void main(String[] args) {
	Scanner sc = new Scanner(System.in);
	System.out.println("Known list{19, 28, 37, 46, 50}");
	System.out.println("Please enter a data for the list:");
	int x = sc.nextInt();
	findsy(x);
	}
	public static void findsy(int x){
	int[] arr = {19, 28, 37, 46, 50};
		for(int i = 0;i < 5;i++){
			if(arr[i] == x){
			System.out.println(x + "index value is:" + i);
			}
		}
	}
}